Preparation And Properties Of Polymer/Molybdenum Disulfide Electrode Materials

Conductive polymers have been used widely as the electrode materials insupercapacitor energy storage devices for their large theoretical specific capacity,simple synthesis method and low cost. Molybdenum disulfide (MoS2) withtwo-dimensional layer structure exhibits excellent capacitance properties and cyclicstability. Composites based on conductive polymers and MoS2are expected to realizethe synergetic combination of the organic and inorganic electrochemically activematerials.MoS2was exfoliated into monolayers by intercalation with lithium followedby reaction with water, and then polyaniline(PANI)/MoS2intercalatedcomposites were synthesized via in-situ polymerization. PANI/MoS2intercalated composites have good solubility in solvent of DMF and DMSO.Their thermal stability and electrical conductivity increased with increasingthe amount of MoS2. The electrochemical properties of PANI/MoS2electrodesindicate that their capacitance properties and cyclic stabilities were improved incompassion with that of PANI. The PANI/MoS2composites provide a specificcapacitance up to390F/g when the content of MoS2is27%in weight, which is3times than that of PANI electrode. The retained capacitance of PANI just42%over500cycles, in comparison, the values over1000cycles ofPANI/MoS2-6and PANI/MoS2-27are80%,86%, respectivelyPoly (3,4-ethylenedioxythiophene)(PEDOT)/MoS2intercalated composites weresynthesized via in-situ polymerization in MoS2monolayers suspension.PEDOT/MoS2intercalated composites can solute in solvent of DMF, DMSO andTHF. Their thermal stability and electrical conductivity increased withincreasing the amount of MoS2. Their performances of PEDOT/MoS2supercapacitor electrode materials were studied and the results show that the specificcapacitances and cycle stabilities are improved significantly with the increase ofdosage of MoS2. When the content of MoS2was31%in weight, the specificcapacitance has amounted to405F/g. Which is about4times than that of PEDOTelectrode, and the capacity retention was about90%after1000cycles.